WATERLOO

Illinois — Community Water System — PWSID: IL1330300

System Information

PWSID	IL1330300
System Name	WATERLOO
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	05
Serves School	No
Wholesaler	No
First Reported	Feb 13, 1981
Last Reported	Dec 4, 2025

Location & Contact

State	Illinois
City	WATERLOO
ZIP Code	62298
Address	City of Waterloo
Organization	LANDECK, J. R.
Phone	618-939-8600

Population & Service

Population Served	10,190
Service Connections	4,245

Drinking Water Violations (112)

This water system has 112 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Apr 1, 2025	Jun 30, 2025	Ethylbenzene	MR	No	Yes	—	0.7 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,2-Dichloropropane	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,2-Dichloropropane	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,2-Dichloropropane	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,1,2-Trichloroethane	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,1,2-Trichloroethane	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,1,2-Trichloroethane	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	cis-1,2-Dichloroethylene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	cis-1,2-Dichloroethylene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	cis-1,2-Dichloroethylene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Toluene	MR	No	Yes	—	1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Toluene	MR	No	Yes	—	1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Toluene	MR	No	Yes	—	1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Trichloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Trichloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Trichloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	o-Dichlorobenzene	MR	No	Yes	—	0.6 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	o-Dichlorobenzene	MR	No	Yes	—	0.6 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	o-Dichlorobenzene	MR	No	Yes	—	0.6 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	CHLOROBENZENE	MR	No	Yes	—	0.1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	CHLOROBENZENE	MR	No	Yes	—	0.1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	CHLOROBENZENE	MR	No	Yes	—	0.1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Benzene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Benzene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Benzene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Nitrate	MR	No	Yes	—	10 mg/L	—	Archived	Jun 30, 2025	Nitrate Rule
Apr 1, 2025	Jun 30, 2025	Nitrate	MR	No	Yes	—	10 mg/L	—	Archived	Jun 30, 2025	Nitrate Rule
Apr 1, 2025	Jun 30, 2025	Styrene	MR	No	Yes	—	0.1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Styrene	MR	No	Yes	—	0.1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Styrene	MR	No	Yes	—	0.1 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Ethylbenzene	MR	No	Yes	—	0.7 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Ethylbenzene	MR	No	Yes	—	0.7 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,1,1-Trichloroethane	MR	No	Yes	—	0.2 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	1,1,1-Trichloroethane	MR	No	Yes	—	0.2 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Combined Radium (-226 and -228)	MR	No	Yes	—	5 pCi/L	—	Resolved	Jun 30, 2025	Radionuclides and Revised Rad Rule
Apr 1, 2025	Jun 30, 2025	DICHLOROMETHANE	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	DICHLOROMETHANE	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 2025	Volatile Organic Chemicals
Apr 1, 2025	Jun 30, 2025	Combined Radium (-226 and -228)	MR	No	Yes	—	5 pCi/L	—	Resolved	Jun 30, 2025	Radionuclides and Revised Rad Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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